U.S. patent application number 10/514664 was filed with the patent office on 2005-08-11 for shift rod connecting structure, and shift rod corotation preventing construction.
Invention is credited to Tsuge, Hitoshi.
Application Number | 20050172745 10/514664 |
Document ID | / |
Family ID | 29544906 |
Filed Date | 2005-08-11 |
United States Patent
Application |
20050172745 |
Kind Code |
A1 |
Tsuge, Hitoshi |
August 11, 2005 |
Shift rod connecting structure, and shift rod corotation preventing
construction
Abstract
The object of the present invention is to set shift rods around
the counter shaft, situated away from a striking rod, and prevent
the rotation of non shift fork equipped shift rods. As a means to
attain said object, the present invention provide a connecting
structure of shift rods characterized by connecting said non shift
fork equipped shift rods (5, 7) to said shift fork equipped shift
rods (9, 10) through inversion levers (12, 13) having mid section
fulcrums (16, 17), and also provides a rotation preventing
structure, with fork type two finger shift brackets (14, 15)
extending from said non shift fork equipped shift rods (5, 7), to
prevent the rotation of said non shift fork equipped shift rods (5,
7) by catching said shift fork equipped shift rods (6, 8) adjacent
to said non shit fork equipped shift rods (5, 7), in said shift
brackets (14, 15).
Inventors: |
Tsuge, Hitoshi; (Aichi,
JP) |
Correspondence
Address: |
Donald S Dowden
Cooper & Dunham
1185 Avenue of the Americas
New York
NY
10036
US
|
Family ID: |
29544906 |
Appl. No.: |
10/514664 |
Filed: |
November 15, 2004 |
PCT Filed: |
May 14, 2003 |
PCT NO: |
PCT/JP03/06033 |
Current U.S.
Class: |
74/473.1 |
Current CPC
Class: |
F16H 63/3013 20130101;
F16H 2063/3079 20130101; Y10T 74/20018 20150115 |
Class at
Publication: |
074/473.1 |
International
Class: |
F16H 063/30 |
Foreign Application Data
Date |
Code |
Application Number |
May 15, 2002 |
JP |
2002-139776 |
Claims
1. A connecting structure of shift rods wherein the first non shift
fork equipped shift rod and the second shift fork equipped shift
rod are connected through an inversion lever having a fulcrum at
its midsection, characterised by the setting of said second shift
rod on the periphery of a counter shaft, situated farther away from
the third shift rod being adjacent to the first shift rod.
2. A connecting structure of shift rods of claim 1, wherein a fork
type two finger shift bracket is extended from said first shift
rod, to catch said third shift fork equipped shift rod in said
shift bracket, preventing the rotation of said first shift rod.
3. A connecting structure of shift rods, wherein the first non
shift fork equipped shift rod and the second shift fork equipped
shift rod are connected through an inversion lever having a fulcrum
at its midsection, characterized by extending a fork type two
finger shift bracket from the first shift rod, to catch the third
shift fork equipped shift rod in said shift bracket, preventing the
rotation of said first shift rod.
4. A connecting structure of shift rods in accordance with claim 1,
wherein said first shift rod(s) is(are) an upper side 3.sup.rd and
4.sup.th speed shift rod and/or an upper 5.sup.th and 6.sup.th
speed shift rod, said second shift rod(s) is(are) a lower side
3.sup.rd and 4.sup.th speed shift rod and/or a lower side 5.sup.th
and 6.sup.th speed shift rod, and said third shift rod(s) is(are) a
1.sup.st and 2.sup.nd speed shift rod being adjacent to said upper
side 3.sup.rd and 4.sup.th speed shift rod and/or a reverse shift
rod being adjacent to said 5.sup.th and 6.sup.th speed shift
rod.
5. A connecting structure of shift rods in accordance with claim 2,
wherein said first shift rod(s) is(are) an upper side 3.sup.rd and
4.sup.th speed shift rod and/or an upper 5.sup.th and 6.sup.th
speed shift rod, said second shift rod(s) is(are) a lower side
3.sup.rd and 4.sup.th speed shift rod and/or a lower side 5.sup.th
and 6.sup.th speed shift rod, and said third shift rod(s) is(are) a
1.sup.st and 2.sup.nd speed shift rod being adjacent to said upper
side 3.sup.rd and 4.sup.th speed shift rod and/or a reverse shift
rod being adjacent to said 5.sup.th and 6.sup.th speed shift
rod.
6. A connecting structure of shift rods in accordance with claim 3,
wherein said first shift rod(s) is(are) an upper side 3.sup.rd and
4.sup.th speed shift rod and/or an upper 5.sup.th and 6.sup.th
speed shift rod, said second shift rod(s) is(are) a lower side
3.sup.rd and 4.sup.th speed shift rod and/or a lower side 5.sup.th
and 6.sup.th speed shift rod, and said third shift rod(s) is(are) a
1.sup.st and 2.sup.nd speed shift rod being adjacent to said upper
side 3.sup.rd and 4.sup.th speed shift rod and/or a reverse shift
rod being adjacent to said 5.sup.th and 6.sup.th speed shift rod.
Description
FIELD OF THE INVENTION
[0001] The present invention mainly relates to the shift rod
connecting structure and the rotation preventing structure of a
manual multiple speed transmission, particularly a manual six speed
transmission.
BACKGROUND OF THE INVENTION
[0002] Up to now, in a manual five speed transmission, a striking
rod (2A) equipped with striking levers (3A, 4A) has been set into
the upper part of a transmission TM, and further, in said
transmission TM, the 1.sup.st and 2.sup.nd speed shift rod (6A),
the 3.sup.rd and 4.sup.th speed shift rod (5A) and the 5.sup.th
speed and reverse shift rod (7A) have been selectively connected to
said striking rod (2A), through said striking levers (3A, 4A), with
said the 1.sup.st and 2.sup.nd shift rod (6A) being equipped with
the 1.sup.st and 2.sup.nd shift fork (19A), and said 3.sup.rd and
4.sup.th shift rod (5A) being equipped with the 3.sup.rd and
4.sup.th shift fork (11A), further, said 5.sup.th and reverse shift
rod (7A) being equipped with the 5.sup.th speed and reverse shift
fork (21A), as shown in FIG. 3.
[0003] In the case of shift operation, shift stroke of said
striking rod (2A) is transmitted to said shift rods (5A, 6A, 7A)
through said striking levers (3A, 4A), and in a case where the
length of said striking levers (3A, 4A) is set to be longer, the
strength of said striking levers (3A, 4A) is ensured to be great
enough to withstand the excessive stress effected upon them during
shift operation, by setting said shift rods (5A, 6A, 7A) near said
striking rod (2A). Being based on said conventional manual five
speed transmission TM, in order to design a more multiple speed
transmission, for instance, a six speed transmission, said 5.sup.th
speed-reverse shift rod (7A) equipped with said 5.sup.th
speed-reverse shift fork (21A) is swapped with a 5.sup.th and
6.sup.th speed shift rod equipped with a 5.sup.th and 6.sup.th
speed shift fork, accompanied by the addition of a reverse shift
rod equipped with a reverse shift fork. Nevertheless, in said
conventional structure, since said shift rods (5A, 6A, 7A) should
be set on the periphery of the main shaft MS near said striking rod
(2A), in a case where said additional rod is set near the counter
shaft CS, it is problematic in that the interlock mechanics and
layout may become overcomplicated, resulting in an oversized manual
transmission TM, and a design disadvantage.
[0004] Alternately, it is suggested that said additional shift rod
be set on the periphery of said main shaft MS, however, in this
case, the resulting large sized shift fork is problematic in
ensuring enough strength during shift operation.
DISCLOSURE OF THE INVENTION
[0005] To solve the above mentioned problems, the present invention
provides a connecting structure of shift rods characterized by the
connecting of a non shift fork equipped shift rod (5, 7) to a shift
fork equipped shift rod (9, 10) through an inversion lever (12, 13)
having a fulcrum (16, 17) at its midsection.
[0006] More concretely, said non shift fork equipped shift rod(s)
(5, 7) is (are) an upper side 3.sup.rd and 4.sup.th speed shift rod
(5) and/or an upper side 5.sup.th and 6.sup.th speed shift rod (7),
and said shift fork equipped rod(s) (9, 10) is (are) a lower side
3.sup.rd and 4.sup.th speed shift rod (9) and/or a lower side
5.sup.th and 6.sup.th speed shift rod (10). Further, the present
invention provides a rotation preventing structure within said
connecting structure of said shift rods, characterized by a fork
type two finger shift bracket (14, 15) extending from said non
shift fork equipped shift rod (5, 7) to prevent the rotation of
said non shift fork equipped shift rod (5, 7) by catching said
shift fork equipped shift rod (6, 8) being situated adjacent to
said non shift fork equipped shift rod (5, 7) in said shift bracket
(14, 15).
[0007] More concretely, said non shift fork equipped shift rod(s)
(5, 7) is (are) an upper side 3.sup.rd and 4.sup.th speed shift rod
(5) and/or an upper side 5.sup.th and 6.sup.th speed shift rod (7),
and said shift fork equipped shift rod (6, 8) is(are) a 1.sup.st
and 2.sup.nd speed shift rod (6) being adjacent to said 3.sup.rd
and 4.sup.th speed shift rod (5), and/or a reverse shift rod (8)
being adjacent to said upper side 5.sup.th and 6.sup.th speed shift
rod (7).
[0008] By providing said inversion levers (12, 13) to transmit the
stroke to said shift rods (9, 10), said shift rods (9, 10) can be
set on the periphery of a counter shaft CS, which is away from said
striking rod (2), so that even in the case of a manual six speed
transmission, the shift fork's shapes are retained, providing for
design advantages.
[0009] Since shift forks attached to said shift rods (6, 8) engage
with the sleeve, the rotation of said shift rods around the axis is
prevented, following which said fork type two finger shift brackets
(14, 15) extending from said non fork shift equipped shift rods (5,
7) catch said fork shift equipped shift rods (6, 8), and the
rotation of said shift rods (5, 7) are prevented through said shift
rods (6, 8).
[0010] Further, loads effected on said shift rods are dispersed to
two shift rods (6, 8) and shift rods (5, 7) through shift brackets
(14, 15).
BRIEF DESCRIPTION OF THE DRAWINGS
[0011] FIGS. 1 and 2 show an embodiment of the present
invention.
[0012] FIG. 1 shows an explanatory sectional view of the manual
transmission.
[0013] FIG. 2 shows an explanatory sectional side view of the
manual transmission.
[0014] FIG. 3 shows an explanatory sectional side view of the
conventional manual transmission.
EXPLANATION OF CODES
[0015] 1 adapter plate
[0016] 2 striking rod
[0017] 3, 4 striking levers
[0018] 5 upper side 3.sup.rd and 4.sup.th speed shift rod (non
shift fork equipped shift rod)
[0019] 6 1.sup.st and 2.sup.nd speed shift rod (shift rod equipped
with a shift fork)
[0020] 7 upper side 5.sup.th and 6.sup.th speed shift rod (non
shift fork equipped shift rod)
[0021] 8 reverse shift rod (shift rod equipped with a shift
fork)
[0022] 9 lower side 3.sup.rd and 4.sup.th speed shift rod
[0023] 10 lower side 5.sup.th and 6.sup.th speed shift rod
[0024] 11 3.sup.rd and 4.sup.th speed shift fork
[0025] 12, 13 inversion levers
[0026] 14, 15 shift brackets
[0027] 16, 17 fulcrums
PREFERRED EMBODIMENT
[0028] The present invention is described by the embodiment shown
in FIGS. 1 and 2. In the upper side of the adapter plate (1) of a
manual six speed transmission, a striking rod (2) equipped with
striking levers (3, 4), an upper side 3.sup.rd and 4.sup.th speed
shift rod (5) (3-4 shift rod), a 1.sup.st and 2.sup.nd shift rod
(6) (1-2 shift rod (6)) being situated adjacent to said 3-4 shift
rod (5), an upper side 5.sup.th and 6.sup.th speed shift rod (7)
(5-6 shift rod), a reverse shift rod (8) being situated adjacent to
said 5-6 shift rod (7), are each supported on axes.
[0029] Further, in the lower side of said adapter plate (1), a
lower side 3.sup.rd and 4.sup.th speed shift rod (9) (3-4 shift
rod) and a lower side 5.sup.th and 6.sup.th speed shift rod (10)
are each supported on axes, with said lower side 3-4 shift rod (9)
and said lower side 5-6 shift rod (10), each being equipped with a
3.sup.rd and 4.sup.th speed shift fork (11) (3-4 shift fork) and a
5.sup.th and 6.sup.th speed shift fork (18) (5-6 shift fork) in the
lower side of said adapter plate (1).
[0030] In said manual transmission, said 1-2 shift rod (6) and said
reverse shift rod (8) are each equipped with a 1.sup.st and
2.sup.nd speed shift fork (19) (1-2 shift fork) and a reverse shift
fork (20), said 1-2 shift fork (19) and said reverse shift fork
(20) each engaging with the sleeve to prevent the rotation of said
1-2 shift rod (6) and said reverse shift rod (8) around said
axes.
[0031] Further, said upper side 3-4 shift rod (5) and said upper
side 5-6 shift rod (7), each connect with said lower side 3-4 shift
rod (9) and said lower side side 5-6 shift rod (10) through said
inversion levers (12, 13), so that the stroke being transmitted
from said striking rod (2) to said upper side 3-4 shift rod (5) and
said upper side 5-6 shift rod (7) through said striking levers
(3,4) is respectively transmitted to said lower side 3-4 shift rod
(9) and said lower side 5-6 shift rod (10) being inverted by said
inversion levers (12, 13).
[0032] By transmitting the stroke to said shift rods (9, 10) using
said inversion levers (12, 13), said lower side 3-4 shift rod (9)
and said lower side 5-6 shift rod (10) can each be set on the
periphery of the counter shaft CS, which is situated away from said
striking rod (2), so that even in the case of a manual six speed
transmission, the shape of said shift forks are retained, providing
for design advantages.
[0033] The fork type two finger shift brackets (14, 15) each extend
from said upper side 3-4 shift rod (5) and said upper side 5-6
shift rod (7), and said shift bracket (14) of said upper side 3-4
shift rod (5) catches said 1-2 shift rod (6) and said shift bracket
(15) of said upper side 5-6 shift rod (7) catches said reverse
shift rod (8), so that the rotation of said upper side 3-4 shift
rod (5) and said upper side 5-6 shift rod (7) around the axes are
respectively prevented.
INDUSTRIAL UTILITY
[0034] In the present invention, since the shift rods can each be
set on the periphery of the counter shaft CS, which is situated
away from said striking rod, even in the case of a manual six speed
transmission TM, the transmission size is minimized and operation
simplified, providing for design advantages.
[0035] Further, since the rotation of shift rods without shift
forks around their respective axes are each prevented by shift rods
with shift forks, interference on interlock by rod rotation and
loosening of said inversion lever are certainly prevented.
* * * * *